us postal service overnight

US Postal Service Overnight – The US Postal Service (USPS) offers overnight delivery through its Priority Mail Express service. This service guarantees next-day delivery for urgent packages, including delivery on Sundays and holidays in some cases. The USPS provides tracking numbers to monitor the shipment’s progress, and the service is available for both domestic and international shipments. Priority Mail Express is one of the fastest shipping options provided by USPS.